Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The sun converts matter into energy in the
a. | corona. | c. | radiative zone. | b. | convective zone. | d. | core. |
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2.
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Most of the sun’s energy is a result of
a. | nuclear fusion. | c. | atomic reactions. | b. | nuclear fission. | d. | coronal mass
ejection. |
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3.
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When hydrogen nuclei fuse into helium nuclei
a. | the nuclei die. | c. | particles collide. | b. | energy is released. | d. | particles
neutralize. |
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4.
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In the sun’s radiative zone, energy moves
a. | by convection. | c. | by solar wind. | b. | by radiation. | d. | by solar
ejection. |
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5.
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The magnetic field of the sun’s corona
a. | stops some subatomic particles. | c. | cannot stop any subatomic
particles. | b. | stops all subatomic particles. | d. | causes Earth to be
polarized. |
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6.
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Auroras are frequently seen
a. | near the equator. | c. | before a sunspot cycle. | b. | after solar
flares. | d. | every 11
years. |
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7.
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What temperature can a solar flare reach?
a. | 15,000,000°C | c. | 20,000,000°C | b. | 1,000,000°C | d. | 2,000,000°C |
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8.
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Which of the following is NOT a solar ejection?
a. | solar flare | c. | prominence | b. | coronal mass ejection | d. | sunspot |
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9.
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Sunspots vary in a cycle that lasts about
a. | 100,000 years. | c. | 110 years. | b. | 1,100 years. | d. | 11 years. |
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10.
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Strong magnetic fields on regions of the sun lead to sunspots because
a. | convection slows and energy decreases. | b. | convection increases and energy
increases. | c. | radiation slows and energy decreases. | d. | radiation increases and energy
increases. |
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11.
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In the equation E=mc2, the letter c
represents
a. | the energy that is produced. | c. | the speed of
light. | b. | the mass that is converted. | d. | the distance to Earth from the sun. |
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12.
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What is the hottest layer of the sun’s atmosphere called?
a. | convective zone | c. | radiative zone | b. | corona | d. | photosphere |
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13.
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Energy produced in the sun’s core is the result of
a. | nuclear division. | c. | nuclear fusion. | b. | nuclear fission. | d. | nuclear
fissure. |
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14.
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The temperature of the sun’s core is approximately
a. | 15,000,000°C. | c. | 4,000°C. | b. | 20,000,000°C. | d. | 150,000°C. |
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15.
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How do sunspots form?
a. | Magnetic fields increase energy transfer in the convective zone. | b. | Magnetic fields
reduce energy transfer in the convective zone. | c. | The radiative zone reduces energy transfer to
the core. | d. | The core shuts down and reduces energy transfer. |
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16.
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What elements make up most of the sun’s mass?
a. | carbon and oxygen | c. | helium and nitrogen | b. | carbon and hydrogen | d. | hydrogen and
helium |
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17.
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Which of the following are part of the sun’s atmosphere?
a. | nucleus and core | c. | photosphere and chromosphere | b. | radiative zone and
convective zone | d. | aurora and
borealis |
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18.
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Particles thrown off the sun’s corona that can affect Earth’s
magnetic field are called
a. | a coronal mass injection. | c. | nuclear fusion. | b. | a coronal mass
ejection. | d. | a
sunspot. |
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19.
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During nuclear fusion in the sun, which of the following occurs?
a. | Atomic nuclei split apart. | b. | The aurora australis
appears. | c. | Hydrogen nuclei combine to produce a helium nucleus. | d. | A solar eclipse
results. |
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20.
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Einstein’s equation E = mc2 helps scientists
understand the sun’s energy because the equation
a. | describes nuclear fission. | b. | explains how mass can be converted into huge
amounts of energy. | c. | describes solar flares. | d. | explains a
star’s specific wavelengths of light. |
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21.
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Scientists break up the sun’s light into a spectrum using a device called
a
a. | corona. | c. | positron. | b. | spectrograph. | d. | chromograph. |
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22.
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How does the sun’s radiative zone compare with the convective zone?
a. | The convective zone is hotter and closer to the sun’s core. | b. | The radiative zone
is cooler and closer to the sun’s core. | c. | The convective zone is cooler and closer to the
sun’s core. | d. | The radiative zone is hotter and closer to the
sun’s core. |
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23.
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What is a prominence on the sun?
a. | a part of the sun’s corona, a cloud of colored gas | b. | a disturbance in the
sun’s atmosphere; an arched, glowing cloud of gas | c. | a part of the
convective zone, a cool area with powerful magnetic fields | d. | a magnetic
disruption in the sun’s photosphere |
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24.
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Which of the following are all part of the sun’s atmosphere?
a. | photosphere, aurora, corona | c. | photosphere, corona,
chromosphere | b. | chromosphere, aurora, photosphere | d. | convective zone, photosphere,
corona |
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25.
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During fusion, a type of subatomic particle is given off called a(n)
a. | atom. | c. | neutrino. | b. | nuclei. | d. | prominence. |
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26.
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One of the final products of the fusion of two hydrogen nuclei in the sun is
always
a. | a helium nucleus. | b. | a more-massive hydrogen
nucleus. | c. | hydrogen protons. | d. | two nuclei made up of two neutrons and one
proton. |
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27.
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Sudden disturbances in Earth’s magnetic field are called
a. | geomagnetic storms. | c. | prominences. | b. | sunspots. | d. | solar-activity
cycles. |
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28.
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What are northern lights?
a. | coronas | c. | solar flares | b. | prominences | d. | auroras |
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29.
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Magnetic fields on the sun are produced by the sun’s uneven rotation
and
a. | the movement of sunspots on the sun’s surface. | b. | the movement of
gases in the corona. | c. | gases in the convective
zone. | d. | gases in the radiation zone. |
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30.
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Auroras form when charged particles from solar wind
a. | react with particles in Earth’s atmosphere. | b. | magnetize the
Earth’s poles. | c. | react with particles in Earth’s
hydrosphere. | d. | magnetize the sun’s atmosphere. |
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